Prerequities fail

[maxijose]

Doing the frontend install, I failed in certain prerequities:

PHP version: 5.1.6 Ok
PHP Memory limit: 16M Ok
PHP post max size: 8M Ok
PHP max execution time: 30 sec Fail
PHP Databases support: MySQL Ok
PHP BC math support no Fail
GD Version: No Fail
Image formats: No Fail
PHP Timezone: n/a Fail

Anybody can help?

[maxijose]

I have correted all the fails except :
GD Version: No Fail
Image formats: No Fail

I don't know how to do that.
Please help me

[maxijose]

I have found the solution.
I had to install the php-gd module